Simulating an egg on a conveyor belt getting smashed
I have solved this with the help of the Fracture Modifier Build of blender.
You can find more info and download it here: 

http://graphicall.org/1148

I also included the steps in a text file inside the modified blend. Open this blend only in the Fracture Modifier Build or you may experience crashes and data loss in the blend.



Steps to reproduce:


delete the cell fracture objects
put fracture modifier on original egg, 250 shards, execute fracture
egg becomes convexhull, active, animated, triggered
fist becomes convexhull, active, animated, trigger
belt becomes passive animated, mesh, final, deforming (so it can 
move the egg shards too) 
scene / rigidbodyworld: enable split impulse (less velocity on shards on
on fist impact, basically) and steps per second to 600 (so shards dont fall
so much thru the belt)
optionally: in FM enable Fracture Utilties -> Fix Normals and refracture 
with Execute fracture, set Autohide distance to 0.001 and automerge distance
to 0.1 and enable perform merge, to hide the cracks in the smoothed egg 
shell
optionally: add edgesplit and subsurf for a nicer looking egg surface